By Greg Bishop Fun facts, stats and comparisons trying to put the GOAT’s career in perspective on the eve of his 23rd season. Tom Brady turned 45 Wednesday morning, and while most middle-aged men clutched sore backs, iced achy knees or put off another workout in favor of riding a golf cart in moderate heat, sport’s most celebrated probably-sugar-free birthday cake added another candle at the start of yet another Brady season. As always, the dots that led here connect, in unusual ways, across sports, in defiance of physics, hence 45 reasons how 45 happened and why 45 matters, especially now. 1….